AWS can't reduce prices and have less revenue. That's not their goal, their goal is to keep expanding products.

They would also bring cloudflare in the spotlight and they already have the core products as a cloud hoster ( rdbms, nosql, serverless, apps, ... ).

Additionally, reducing eggres and making use of 3rd party products possible is not in their interest long term ( eg. The fork of elastic search).

What do you think they can do/announce?