You never know who is going to show up in these movies, so maybe that could be a platform for Portman to return.
Endgame certainly promises to shake up the MCU as it will mark the end of the franchise so far … but Thor 4 may be in the works per recent words from Thompson.
As indicated by Natalie Portman’s recent comments, the MCU is always shifting, changing and bringing in more exciting characters to expand the universe, such as Tessa Thompson’s Valkyrie, a new fan favorite in the Thor movies we can’t wait to see keep being badass.