In case you didnt know the seris ended at 25, then movie then episode 26.
The reason is the movie pissed off allot of hardcore fans who i read sent the author of evangelion death threats (ironically for killing off all the characters except asuka and shinji). This got him so concerned about his own life that he created a half assed episode 26 which was poorly written AND ended with the entire evangelion movie "all in his head." I guess it satisifed the hardcore fans who wanted to see an expanded evangelion univerise story but for more... mentally stable people the world ended and that was that, which is why i think evangelion was so good, it was a good story and in the end everyone died so they cant make some crappy spin off in a couple years, it will become a legend!
Honestly i think more people should follow his lead, Althoguht you might disagree matrix 2 and 3 i thought were utter failures. If it ended at 1, (without the superman flying at the end) it would be in my eyes one of the best movies of all time. 2 and 3 kinda tainted it in my eyes as well as crappy spin offs like "animatrix" matrix games. Jurassic park you cannot tell me was better with 2 and 3, if it ended at 1 it would be better off.