Well, not so much epic as satiric. I like to think that I draw inspiration from the greats (Friendship is Witchcraft, Terry Pratchett, etc) and then ruin it.
At this point I know how the story is going to end, I just need to build the bridge.
I am impressed by some of the MLP fan fiction I have read, and equally depressed by some of it. After perusing what is available, I think that I would put myself in the upper 1/3 of the writing talent out there. That sounds impressive until you start reading some of what the bottom 1/3 is producing, and suddenly it becomes more akin to beating a double-amputee in a foot race.
I would like to get a bit more involved in the writing community, by critiquing and helping some of the starting writers, but some of the stuff is so bad that I feel myself slipping into Truman Capote mode as soon as I begin reading. "That isn't writing at all, it's typing." It is hard to slog through a story where the writer seems to think that the only valid form of a verb is the gerund, and punctuation is his personal Kryptonite.
You can try to put a positive spin on it to encourage the writer, but at some point you are reduced to platitudes like, "Your story contained a lot of words. Boy howdy, I counted at least a hundred different, identifiable words in there that appeared in a variety of combinations. Yup, lots of words."
On the other hand, there are a couple of stories that I have been meaning to get back to, but I forgot to favourite them. I need to go back through my Reddit comment history and see when I responded to the author of one of them. If I remember right, that one had all the hallmarks of some wonderful MLP satire.
I like satire.