According to /Film, Marvel Studios is developing an animated anthology series based on the Marvel What If? series of comics for Disney+. Kevin Feige will produce the series, though it will obviously not be set in the Marvel Cinematic Universe, though the report speculates several actors could lend their voices to the series, reprising their roles from the MCU.
The Marvel What If? series re-imagines key events in Marvel History, rewriting them to speculate what could happen if certain details changed, though it’s currently unknown which stories are being adapted. Expect more information soon, as it develops.