I did the 1/2 on Saturday and was supposed to do the marathon relay with my dad on Sunday as the second runner, but I'm seven months pregnant so I let enough people talk me into not doing the relay and got my husband to do it instead. I came out and cheered and was at the transition point.
My dad crossed the finish at 9:16 AM with a 14:40 pace (he was in the last corral). As I was walking back to the Polynesian with my dad, we heard the announcement that all of the remaining runners could go to avoid being swept. I didn't look at my watch but that was right around 9:30 AM.
I can also confirm they stopped the timing clock at the finish line at 7 hours 31 minutes (clock time, not chip time - since it was a wave start). They let people finish that were already in the park, but you wouldn't have received an official time if you came in after that. My darling husband came in at 7 hours 27 minutes so it was a real nailbiter for me

I'm very proud of him for finishing with absolutely no training, but it's a good thing my dad wasn't walking the 16 minute miles he normally does with me

[We normally wouldn't care, I'm a firm believer in the WISH slogan, but since I finished a race 7 months pregnant and my husband ended up doing a half he otherwise never would have, we had decided we were going to go to
disneyland to get the C2C]
My only complaint with the marathon relay was the merchandise. Why didn't they have a pin? I know there were only about 1800 people doing this, but they could have at least had one as part of the pre-order so they would know about how many to make. Instead if you wanted a pin you had to pick between the 1/2, which is the right distance but wrong race/date, or the marathon, which is the wrong distance. There was only the one "We Did It" shirt, which my husband didn't think he wanted when we were at the expo but then changed his mind, and they were totally sold out by the morning of the race. So he got no merch whatsoever.
We were staying at the Poly so the relay exchange wasn't an issue for us - he got to sleep in and walk over when he was ready. But Disney should have arranged some sort of transportation for the second runner to get there if they weren't staying at the Poly, and made it more clear for runners staying at hotels on the monorail route that they could do this. I only knew because of the map that was posted on here!