So I was thinking about how Fant4stic could possible fit in the X-Men universe and how we would ever get Mole Man in the franchise. In my theory there is one answer, The Negative Zone.
If you've noticed, in the Fant4stic trailer 6 people enter the teleportation machine. Obviously 5 of them are Reed, Sue, Johnny, Ben And Victor. But who's the sixth? Without a doubt in my mind, the sixth is Harvey Elder. He is a main character in this movie and based on what we know it only makes sense. So they go to the Negative Zone and they come back altered, almost dead. You know, the usual origin story stuff. But one person didn't come back, Harvey Elder. He died in the Negative Zone. At least they think he did.
If you don't know the Mole Man origin story here's a brief summary. He finds an island, has a race of creatures called Moloids, stays there, becomes the ruler. But how does that work in the movies? Here's how! Harvey travels deep into the Negative Zone and finds a cave. In this cave he seeks refuge but finds himself in a civilization of Moloids. They bring him back to good health (or something helps them bond). The Moloids are amazed by a human, they think he is a god. So Harvey Elder is now the ruler. This all happens off-screen during Fant4stic. Fast Forward To Fant4stic 2. Harvey Elder finds a way back to Earth, thinking he was left for dead. He wants to kill everyone involved with sending him to space. But he does this even publicly, which causes the military to get involved. So now we have his motivation and why he wants to kill everyone. Thinks he was left for dead, now the military is trying to stop him from getting revenge.
On to the X-Men connection. As we know, X-Men Apocalypse will pretty much be a disaster film. There will be many civilian casualties and many cities destroyed. After this movie the government will see what mutants are truly capable of and want to get rid of them efficiently. Well after X-Men Apocalypse, The Fantastic Four become public scientist/celebrities like in the comics and now the public knows about the Negative Zone. So, the government decides they want to take mutants to the Negative Zone. The Fantastic Four feel responsible for this happening and they try to stop it.
This theory is probably far from what's happening. But hey, I thought it would be fun to speculate and post about. What do you guys think will happen? I'm really excited about the future of The Fantastic Four!