Well, 41m16s x 4 = around 2h44m
That's LONG. Either the movie is very long or D part is disproportionally long.
Sorry for being a downer but nothing about the D part being 41 minutes long gives any indication Final will be longer than the standard 2h max cap. The final climax segment is always the longest in this film format and there's no reason to assume parts A-C are anywhere near as long.
Just for comparison I took a look at my Macross Frontier: Sayonara no Tsubasa
guidebook as it has detailed breakdown of the movie. That film has 5 parts, A-E with the E part by far the longest (it covers the whole climax and one scene that is more leadup to it than anything).
In case of Sayonara:
E Part starts at 1h21min mark.
End credits start rolling at 1:49:30, total length is 1:54:22
So the final E segment is 28 minutes if we don't count the credits, 33 minutes if we count them. As Final will only have four
parts anyhow I find it very unlikely D part being 41 minutes indicates the film is longer than the standard length.
Unfortunately that tweet revealed D part covers everything up to the "end roll". So it is confirmed Final will have end credits. Sad! No End of Evangelion cold ending stuff here.