3. Guardians Meet The Avengers
The potential for thrilling, interesting and downright hilarious interactions between the members of the Avengers and the Guardians of the galaxy is extensive to say the least - and that is exactly why it must happen. Imagine the inimitable Tony Stark's reaction to Groot and Rocket Raccoon. Imagine Hulk looking down at his fellow green beings in Gamora and Drax the Destroyer and being somewhat confused. Imagine Star-Lord's reaction to the fact that his Mother's home planet has produced such capable heroes. Imagine Yondu wanting to hunt the Avengers to take Hulk or Thor home as his bounty. Imagine Captain America and Star-Lord's potential for either mutual respect or rivalling each other for authority. The possibilities for some truly gripping interactions are endless. Also, the potential for an initial battle between the two teams, before realising that they're fighting the same cause and teaming up to battle an ultimate evil is a mouth-watering prospect. And simply seeing the two teams on screen together at the same time would be a fanboy's dream.