I really love this movie a lot, because of the main villain, Scarlet Overkill (including the voice actress, Sandra Bullock), which is why I giving it 5 stars.
Although the movie has a mixed review, but I really hope (& wish) next year or soon if Illumination would ever make a Scarlet Overkill origins film to celebrate the 15th Anniversary of Despicable Me (including Illumination) and 10th Anniversary of this movie in 2025.
If we do get a Scarlet Overkill origins film, I was thinking the main antagonist would be a similar counterpart of Dr. Nefarious from the Ratchet & Clank franchise.
Plus I had this interesting idea name for the main villain's which will be named "Dr. Annihilator", he'll be a perfect voice by Armin Shimerman.
Another villain/antagonist I had in mind in Scarlet's origins film would be an evil youngest child (with an walking-robotic throne, similar to Percival Tachyon from Tools of Destruction) who wants to build his Criminal Empire at young age and become an emperor of the entire world.
Not only that Herb as the deuteragonist in Scarlet's origins film, but with another supportive deuteragonist (or a tritagonist) character, who's a biggest fan of Scarlet and help her build her own Criminal Empire.
At the end of the movie, he'll tell her and Herb that he wants to follow his own "path" of villainous & his own Criminal Empire, and planning to form an alliance with Scarlet's Criminal Empire.
Plus, before his plans, he wants to have a retirement so he can focus on much of his training & research, and spending time with his family and making friends (who are a fans of heroes & villains).