Microsoft rejected a Halo and DOOM crossover for Amazon's Secret Level series
, by Thibaut
Secret Level is an Prime Video's series that pays tribute to several big video game franchises (and to Concord). That said, some ideas didn't make it into the final product... and this was the case of an interesting crossover.
In an interview with Collider, series creator Tim Miller expalined that they pitched an episode featuring both Master Chief from Halo and the Doom Slayer from DOOM, but Microsoft didn't give the go-ahead.
In any case, Secret Level has already been renewed for a second season.
Source: collider.com