Verified answer

They most likely filmed all of his cameos for the 2019 films. After that, they may as well retire the cameo.

They already have plans for Phase 4 in 2020 and beyond. The MCU will continue without him.

Not a chance will they end and no I don't see them using CGI for his cameos.

They've already filmed his cameo for Avengers 4.

Chances are, it'll just be the last cameo and they'll stop them after that.

He just won't be in them.

This was a REALLY crappy way to learn he has passed.

He shot a LOT of cameos before he died so we will still have him through the end of 2019.

I'm sorry to hear he's dead. Yeah, they might CGI him for a brief cameo appearance, like they did with Carrie Fisher.

it's a pity that he died

https://youtu.be/du88WArjb8w