I would expect one of these companies will want to attempt what Sony did and accumulate a music business. The question will be how they can manage to align that with the media restrictions they have to live within. Maybe Toutiao is young enough to still dare to attempt it, I think the older, larger Chinese Internet companies long ago learned to avoid challenging the CPC's boundaries.
In a less restricted atmosphere, companies like Snapchat or Twitter would be prime take-over targets for some of the Chinese giants looking for international expansion. I think a company like Tencent might have acquired Twitter by now if they could operate the platform without censorship trouble.
When it comes to app, companies will be ready to compromise to get as much data as possible (available).