Top 10 Video Game Crossovers That Should Appear On Game Theory's Crossover

Crossover is a show on The Game Theorists YouTube channel where two guys try to connect all video game franchises into one universe. There hasn't been a video about one since September 9, 2014. Here are some suggestions.
The Top Ten
1 Mario to Crash Bandicoot

If Sonic is in the same universe with them, you bet I would want a new Crash Bandicoot game with Mario & Sonic.

2 Little Big Planet to Kirby
3 Pac-Man to Five Nights At Freddy's
4 Mega Man to Mighty No. 9
5 Banjo-Kazooie to Spyro
6 Call Of Duty to Battlefield
7 Mario to Parappa the Rapper
8 Angry Birds to Sonic the Hedgehog
9 Grand Theft Auto to Metal Gear
10 Street Fighter to Mortal Kombat
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