I don't expect wordle to change at all. The site will probably become NYT themed and try to push you to download the crossword app. Daily puzzle will still be free on the app and site. They just want more people in their puzzle ecosystem.
I hope you're right, but the NYT article isn't very promising. It says "The company said the game would initially remain free to new and existing players," and then spends the rest of the article talking about how their business is all about subscriptions.
They've paid over a million for it. It'll be nice if they keep it unchanged but I doubt they will.