mom2rtk -
It is a really cute, festive parade. I think you'll like it. I'm not big on parades in general, but I have seen the Christmas Fantasy Parade a few times (sometimes it seems like I can't escape it, even when I try!

) and I enjoy it. It's colorful, lively, Christmas-y, and all of that good stuff. There are adorable snowmen with chubby cheeks waddling along, and gingerbread men with flat bottoms moseying down the parade route. The song will stick in your head for a while after you see it, too!
I had to giggle at the "mass revolt" reference.

I think that's very much what it would be like -- at the very least, a mass revolt in terms of DLR getting bombarded with mail, e-mail and angry comments under the Parks Blogs!
I know that a lot of folks think that if DLR were to suddenly introduce a Christmas party in Disneyland, and include the Christmas Fantasy Parade, Believe in Holiday Magic Fireworks and snow as exclusives of that party for the bulk of the season, it would be the same situation as it was when DLR first started making the Halloween Screams fireworks a Halloween party exclusive.
But that's not entirely true. The Halloween Screams fireworks were literally only available to the general, park-visiting public for one year, or one Halloween Time season (2009). That's it. They were new to all of us at Disneyland in 2009 (and the Halloween party was still being held in DCA in 2009), and in 2010 the fireworks were suddenly part of the party, which had moved to DL.
Basically, the 2009 Halloween Screams run was a way of getting people interested enough in them to want to pay extra to see them the following year. BUT since Halloween Screams only had that one-season run in 2009, it's not like they had worn out their welcome and become "old." The Halloween fireworks had not become traditions for anyone in only one season's time. A lot of people were not able to see those fireworks in 2009, and so their only chance at seeing them post-2009 was to buy tickets to the Halloween Party.
So I can totally understand that Halloween party exclusive scenario as far as the fireworks are concerned. Also, Halloween Time as a season is not as big of a deal at DLR as the holiday season is, so lots of people will skip Halloween Time in general anyway.
In the case of the Christmas Fantasy Parade, Believe in Holiday Magic fireworks and the snow on Main Street, etc., these are longstanding, long-existing traditions. It's not like these events have only been around for one holiday season and that's it. Far from it. There are many, many, many people who have seen them -- and not just locals. There are plenty of people who travel out here just for the holiday season every year, from other states and countries, and they've all seen the parade and fireworks. Sure, of course there are people who have
not seen the parade and fireworks (like you!), but it's not the same situation as the Halloween Screams fireworks.
So, based on those facts, I think that having a party and throwing in only the longstanding traditions could, quite possibly, alienate a lot of the yearly holiday visitors and cause them to not want to buy tickets for things they have already seen several times. That plan could backfire on DLR.
At first it seemed like DLR was prepping the Candlelight Ceremony (last year) to be a potential addition to a future Christmas party by running it for 20 nights straight. That seemed very much like another "Halloween Screams scenario" to me -- where they run something every night for a block of time to get people interested enough in the event to want to pay extra for it the following year.
But, once I saw the Candlelight Ceremony a couple of times (and absolutely loved it!) I felt like it might be too religious and intimate to throw into a fun Christmas party, if that makes sense.
Now I think that, if anything, the 20-night run of the Candlelight Ceremony last year was DLR's way of getting people interested enough in it to want to buy dinner packages for it if the Ceremony is moved to a new location this year. I think that is what the 20 nights were all about.
I definitely agree with you that IF a Christmas party is to be held in Disneyland, then to make it more palatable to all of those people that DLR could alienate they'd likely have to soup it up and add in a bunch of
new extras -- not just stuff that thousands and thousands of people have already seen for years -- to entice us all to buy tickets. They can't
only rely on newcomers to the holiday festivities to buy party tickets. They have to tap into that "longtime holiday visitor well" too. If they created an all-new holiday parade or an all-new holiday fireworks show, those would serve as good "bait" to reel everyone in. There would have to be something totally new and different. I don't think they could get away with only using the existing holiday parade and fireworks as party bait without looking totally Scrooge-like and greedy all at once.
Or, as I've thought all along, a great idea to introduce a Christmas party would be to start it in DCA for the first year -- just like the Halloween Party used to be held in DCA before all of the major construction walls went -- and really draw attention to the fun Cars Land and Buena Vista Street decor, add in an all-holiday World of Color as the selling point and throw in some other extras too.
So those are the only two ways I can see a Christmas party being fully accepted by most people -- adding in totally new things to be the selling points for a Disneyland party,
or starting the party in the "re-imagined" California Adventure so it will have a bit more novelty to it.
Otherwise, expect the mass revolt!

And if a party appears in Disneyland, expect the Candlelight Ceremony to head across the Esplanade to DCA. I don't
think they would both co-exist in one park.