I heard some news via email from a friend who knows someone in the production team about Ace Attorney 5.

Apparently, both Phoenix/Naruhodo and Apollo will be available. This was hinted at, at the end of Apollo Justice Ace Attorney, when Phoenix/Naruhodo said that he might take the bar exam again. Furthermore, there has been talk of a 3rd Defense Attorney. My bets are on it being Godot/Armando (Trials and Tribulations), however there is a small chance that it will be a new attorney.

I also heard that a new system is being developed for the Jury System. Im thinking it might work like this: instead of penalties, you start out with 50% of the jury on your side, for each objection you get right, the % increases, and vice versa for bad objections. There might also be times when you press, and it will either increase or decrease the % by a bit, but this is mere biased speculation and should not be believed unless evidence (pun) is submitted in an official announcement.

Finally, there is talk of a returning character other than Phoenix/Naruhodo... I wasnt able to find out who, but my guesses are on Maya & Pearls, but older.

As I said, this information is only {FoF} and not exactly official. Believe at your own belief, I believe it myself because that seems to be the most likely situations... in other words, what we can already expect anyways without them having to tell us anything.

Even still, I have to admit that it does seem somewhat likely.

I'd take this info with a grain of salt until there's a reliable source to back it up.

Almost definitely fake, but I would not mind it if it was real. The ideas really work to say "oh hey, THIS is how you bring AA into the future!" The jury system would be much better than simply "five chances, you dead" system.