I think we'll get some new announcements but I wouldn't expect that many.
Final fantasy 15 - probably not. It sounds like they are only testing to see how or if they can even put the game on the switch right now so it doesn't sound like enough progress has been made to announce it yet as it might not even happen.
Fallout 4 - again unlikely. I think they will wait to see if Skyrim will sell well first.
Smash bros and animal crossing - a smash 4 port could be the most likely of all of these. Animal crossing could happen
I think this direct will mainly talk about things already announced for switch and maybe one or two new games from Nintendo may be announced. They will show off more Mario, and most likely talk about the zelda dlc, release dates for Skyrim, and Xenoblade 2, and maybe some indie titles like stardew valley and yooka laylee could get a release date. They will probably talk about the Kirby and yoshi games coming out next year and maybe unveil more about the fire emblem switch game coming out next year. I think they'll throw in some fire emblem warriors dlc due to the extreme amount of hate it's getting from only putting characters from the last two games in plus Marth. Hopefully some Pokémon ultra sun/moon info since we know nothing about this game coming out in 2 months. If any new games get announced, it'll probably be 3DS games since I think after Pokémon, Nintendo hasn't announced any big Nintendo games coming to it.