Oh boy, let's see here!
Toy Story is probably done as a franchise once the 4th film hits (regardless if it becomes a huge hit or not), so can't really see a 5th film happening especially with the current age that Tom Hanks and Tim Allen are at (and with Don Rickles gone, a 5th film in the series is very unlikely to surface, unless they do a mass recasting and a soft sequel/reboot).
Incredibles 3 is pretty much a 100% guaranteed at this point after the money I2 made so far and is continuing to make (there are hints riddled within the 2nd film that can set up for the events of I3 (and in the process fix what went wrong with I2 in terms of character arcs), most notably with the build up of Violet Parr (and Tony Ryndinger to a degree), and her interactions with Voyd and Winston likely being the main benefactor for I3 to happen and with Evelyn arrested (instead of being killed off like Syndrome was in the first film), she has a chance to be redeemed as a villain (with Fyronic being the big bad), plus the issue with the Underminer needs to be resolved (Bomb Voyage is likely getting his pay-off already played out via the comic series that launched alongside I2 if that comic ends up being canon), I also see the third Incredibles being the very last sequel Pixar makes in history, plus both Samuel L. Jackson and Sophia Bush want to return for the third film (especially if Jackson's still alive as is the rest of the cast).
Cars 4 is a safe bet to happen as it's one of Disney's biggest moneymakers and we already got hints as Owen Wilson has talked about it after the third film's release and wants to see Cars 4 go back to the route that Cars 2 took as a spy/thriller (but better handled and hopefully no Mater as the lead, Mater is what killed Cars 2's chances).
A third Finding film seems very far-fetched at this point, I can't really see how they can carry on the series now that Marlin's, Dory's and Nemo's respective character arcs were all wrapped up in both films nicely (I honestly can't see the Tank Gang leading their own film as well compared to Dory, Marlin or Nemo).
Inside Out 2 (Outside In?) is a safe bet to happen with Riley in her late teens/early adulthood would be too much to pass up especially if Pete Docter returns, there's more to this world especially with Riley being near adulthood.
Brave 2 is probably going to happen, seeing Disney clearly has not forgotten Merdia (with her appearing in Ralph Breaks the Internet) and they have talked about doing a sequel at some point.
As for sequels such as A Bug's Life, Ratatouille, WALL-E, Up, The Good Dinosaur (which is the only known Pixar Original to bomb in Pixar's history outside of Cars 2) and Coco, not a chance.