I think kitana finds out she is princess of Edenia in her MK2 ending... as for years... hmmm I really don't know... check the Games section.. they probably have the MK3 intro and they probably say it there

Yes Kitana was the princess of Edenia in MK2. I dont think that alot of Years have passed. When Shao Kahn was defeated in MK2 he got angry and wanted to take over Earthrealm. He took all the souls of the mortals. Only the chosen warriors could defeat him again.

Did she kill Mileena After in Mk2?

No as far as i know she didnt.

MK2 Ending:

"As a result of her years of work as an assassin, Kitana has learned many secrets, especially about her past. She discovers that Mileena is not her twin but a grotesque clone created by Shang Tsung. "

"She learns that her parents were former rulers of the Outworld overthrown by Shao Kahn. Determined to take back what is hers, she must defeat Kahn. She does so by entering the tournament. She reclaims her parents' castle and restores the Outworld to a realm of beauty."

MK3 Ending:

" Kitana evades the evil clutches of Shao Kahn and escapes into the unknown regions of Earth. She survives an assassination attempt by the vile creature Reptile, and allies herself with her onetime comrade - Jade."

"Together with the help of Earth's Warriors, Kitana reaches Sindel and turns the Queen against her Emperor. With Shao Kahn defeated the Earth is changed back to its original state, as is Kitana's realm of Edenia.

She will be forever in debt to her friends from Earth as she rules the new realm of Edenia at Queen Sindel's side."

Ok thanks

Careful though... by UMK3 Mileena is definetly dead... since she is already working for Shinnok... so I guess she did die during MK2... and she was definetly killed by kitana since that is when Shao Kahn declares she is a traitor