What will the upcoming Legendary's Kaiju Cinematic Universe bring us after Godzilla vs King Kong?

Well, so far for what they have planned for us are; Kong: Skull Island in 2017, Godzilla 2 in 2018, and then Godzilla vs King Kong in 2020. Will this be enough to start the universe? Most likely. And this can give fans, and Legendary opportunities to make so many crossovers and make a brand new franchise. Basically, I'm just gonna say what I think Legendary may do, or what possibly could and ever be made.

Godzilla vs MechaGodzilla- of course, this isn't much of a surprise as we all determined this would happen at some point, but instead we get Godzilla vs. King Kong. I would really like to see how Gareth and Legendary can make this happen in a creative/realistic way.

Godzilla vs Gigan- Okay, this is something I really want to see. Of course, Gigan had only made three appearances in Godzilla vs Gigan, Godzilla vs Megalon, and then Godzilla: Final Wars (I was actually interested to see how Gigan could've been made in the heisi series). Now this would be something somewhat scary, and really awesome to see. Now, I've already thought of how this could work as this franchise revolves around Monarch. So, somewhere in the arctic, Monarch has an expedition searching for any hidden kaiju as they find Gigan. They bring him back for studies as he's closely/somewhat related to the first MUTOs that Godzilla killed in 2014. Gigan wakes up going on a rampage, as Godzilla rewakens to fight the threat as he's displayed as a alpha predator to bring balance.

Godzilla vs Cthulhu- Most likely, there's no way this could be made, but is a small possibility. This wouldn't be very popular, but it will most definetly get the fans on board. As seen before and mentioned, there's been multiple debates of who would win, and how this so much fanart of this topic. Now, with the realistic tone to Legendary's Universe, will it happen.... no, but it could play as an extra, stand alone, or "backup".

Godzilla vs Gamera- And we all know the biggest thing, GODZILLA VS GAMERA!!!!! Now, I know this is the biggest thing that all of the fans would go crazy for. The only way we could ever get a crossover between them would be through Legendary's franchise (considering TOHO and Tokusatsu would have troubles with rights and etc). And before this would happen, there would probably need to be another stand alone Godzilla film or sequel leading up to this, and a Gemera film as well. This is basically the only way we could ever see them clash with each other and fight. (And I honestly think this won't be made until like the 100th anniversery or something, but still an amazing idea!)

Gamera- Well, Legendary could possibly do this. But I don't have much in mind about this, although it could work well.

Anyway, I ran out of some ideas, those were some of the things I've been thinking of what Legendary could make. Let me know what you guys think, and write down some ideas you have in mind what Legendary could make.