Spider-Man could be leaving the Marvel cinematic Universe if Marvel Studios and Sony can't come to a new deal for future films. That means Spidey won't be in any new Avengers movies, nor will he have a cameo from other MCU heroes. He'll more than likely be teaming up with Tom Hardy's Venom.  Disney allegedly wants to share the profits of the film 50/50 but Sony was happy with the previous deal. That original deal gave them 95% of the profits and Marvel 5%. The Crawlspace breaks down the contract and sees which side has the upper hand. 
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