WrestleMania XX on March 14, 2004
I think he will come back this year.
1865
yes he is on 17 october.
undertaker will be back this year and soon,no other demons
He is taking a brief hiatus, but he will return.
after the Royal Rumble about the same time as last year
He will return after the first of the year like always
undertaker never retired
2002 Royal Rumble, Maven eliminated The Undertaker with a dropkick, Undertaker (under the 'Big Evil' gimmick i believe) then re-entered the ring & beat MaVen until he was unable to compete. If i recall correctly - Maven was never officially eliminated, but was unable to compete. Ended up leading to Maven taking the hardcore title from The Undertaker.
Undertaker joined WWE in the year 1990
She is spending time with undertaker since they are married and then she is coming back, but that could take a couple months to a year.
This year will be number 18 for the Undertaker.