User blog comment:GunjiBunny/Fanfiction Title/@comment-3270170-20160415144034/@comment-5782071-20160415234130

Also, Jake and Leena cannot appear at the same time. Leena was dead by the time Garrett joined the Warehouse, and he has been around for at least 5 years or so, and Jake wasn't. With the fact that the Element Bearers (og which there are 6, who have yet to be given proper characterization) are around means adding Jake would becoem too crowded too soon.

However, as you said this is a one-off, I suppose anything is fine as long as it doesnt interfere with current WH wiki canon. I'm afraid I can't think of anything for a title at the moment, but I'm happy to assist in any way I can. Have fun!