According to the recent announcement from Crystal Dynamics, they will be ending the Marvel’s Avengers support at the end of September this year. Game will receive its final update on 31st of March.
To make things clear, they also mentioned that singleplayer and multiplayer modes will be available.
Game has been live for around two and a half years and received multiple content updates throughout this period. Developers specified that the Update 2.7 was the last new content update for the game. Update 2.8 will be the final one for balancement on 31st of March.
Marketplace will be closed down with this final update and remaining credit balances will be converted into in-game resources as the game will stay active.