Candlelight processional is usually first or second weekend in december. Remember Candlelight processional is not like WDWs. DLs candlelight processional started out at DL for CMs, and it still remains to be the main focus. Most of the tickets are given to the CMS, with the remainder being released to the public. For a few years they had it in the Fantasyland theater, but moved it back to the trainstation last year. You can line up along the parade route and watch them come singing down mainstreet, and if you're in the area you will be able to hear it, but the main areas are blocked off for those with tickets. The tickets available to the public are usually given out early that morning.
Unfortunately this is a special year, so it's hard to tell exactly what events they will keep and what events they will not. In previous years, they have moved the main parade to be during the day, and had the christmas parade at night (thus they would only show Parade of dreams once) (or vice versa). One rumor is to move it to DCA, but then they'd have to work it between block party bash and electric parade (on weekends). I hope they do not forgo the christmas parade entirely.
If fantasmic is showing it will probably only be on the weekends, and I'm not even sure if it will continue to show. In the past DL has alternated having either Fantasmic or Fireworks showing on weekends only on the off season, usually not both.
Donna