Do you think Season 4 will get a new intro animation to go with the current status quo of the show?
A good friend on Reddit, Malthus1, said... well they can't just edit around the wand but "major bits of the “plot” of the opening".
"For example - Star and Marco stomp on the roof of Ms Heinous’ car, and she and Gemini look out; Gemini is now dead, and Ms Heinous is now baby Meteora. They then go past an empty crystal that used to have Eclipsa in it, and confront “possessed Ludo” on Bird and Spider, who raises his wand-hand to attack them. This, specifically, is the part that became obsolete right after Battle for Mewni (Ludo is no longer possessed and no longer has a wand-hand). Just changing the wand won’t work (never mind that she gave the wand to Eclipsa ... )."