Originally Posted by Lorus
As much as the Avengers sequel is going to be a continuation of whatever happens in other films such as Iron Man 3, Thor 2 etc, it's also got to be recognisably a follow up to The Avengers and as such it should build on the dynamics already established by that film.
If you want it to build on the dynamics already established in The Avengers, it means it must be the other way 'round. The Avengers sequel is not a continuation of IM3, T:TDW and CA:TWS, The Avengers sequel must be a continuation of The Avengers, while being set after the events of the precedent MCU movies.
Do you see how much they cared about Cap finding out what hapenned to Peggy or Thor trying to find Jane back, and not a word on Beth and Banner (although it could be argued that storyline is now over). I think they will (and should) keep The Avengers with the Avengers, and the other series where they belong, with little crossover on some occasion, like Nick Fury appearing everywhere, Cap's shield in Tony's house, ect.