DanielRPK (the source breaking the news that they're reporting) has a very, very spotty track record as an insider. He has traditionally been pretty good about marketing news (announcing trailer drop dates way in advance and what will be in the trailer) but his actual scoops on the shows themselves tend to be way less accurate. This has led people to believe he works in some capacity with trailers/commercials but doesn't have access to anything beyond that.
It's basically been all but confirmed that Cage, Jones, and Punisher will be returning in some capacity by others, but I don't think anyone is reporting they're ALL going to be in Born Again. Maybe have his wires crossed or may be making things up again (he has been accused of doing this when his news gets slow.) And if the trailer thing people believe about him is accurate, this show is nowhere near having any marketing materials so he wouldn't have access to anything.
On a source tier list I'd describe him as "Right enough about some things not to completely ignore, wrong enough about other things that you should take it with a massive grain of salt."