It's hard for a Marvel film to "bomb" commercially these days but I guess no more Black Knight spin-off, Eternals team gets reduced to side characters, and Papa Feige will come back and stick to the old Marvel formula in the next films?
Personally, I don't think Eternals will get a "Thor treatment" because Thor was specifically chosen as one of Marvel's trinity (Thor - Cap - Iron Man) in the previous phase, so they had the patience to try to "fix" his solo films (from TDW to Ragnarok), while Eternals have a big team, it's either include all of them or reduce them all.
I wouldn't call Doctor Strange 1 "bomb" but due to its "lukewarm" reception from the fans, it's reported that Marvel has recruited a ton of other old and new characters to DS2, now it's more like Marvel's magician assemble film than Dr. Strange's solo film.