Honestly, mediocre they may be, Abrams deciding for himself what is or isn't canon would be distasteful as fuck and an insult to the fucking creator of the sandbox he is playing in.It's best to think that the PT didn't happen and that Jedi have been rare and mysterious for centuries. Thankfully it looks like JJ is distancing himself from the PT, so that should make it easier to ignore.
I'd hope he'd have the tact to not straight up revise history on a universe he did not create. There already shouldn't be a need to go deep into referencing the prequels due to the timeframe of the film, but I'd hope he does not feel the need to go out of the way to contradict them.