It's possible the story is wrong. Every major news outlet I have read simply refers to the CNN report.
That doesn't mean an indictment won't come, but at this point it seems very unlikely to entangle anyone close to Trump.
Manafort seems the most likely, since he's had plenty of dealings with Russians. The problem, if it is manafort, will be that Mueller signals to everyone paying attention, they have nothing and this has been a colossal waste of time for the people thinking Trump or his cabinet were going down.
Plus Manafort has had extensive dealings with the swamp, namely John McCain (being his campaign chairman) and the Podesta Group, among many others. If they go after Manafort it's pretty much over for the liberal conspiracy theories.