I'd be shocked if it's not the Lakers, all signs are pointing towards that direction.
Davis is represented by LeBron's agent and close friend Rich Paul. LeBron received a warning from the league for tampering when he approached AD about joining him earlier in the season. This week news came out that the Lakers were willing to part ways with their young core to grab a superstar. A couple of days later, AD requested a trade.
AD requesting a trade mid-way through the season also means that he probably doesn't want to go to the Celtics, who are most certainly interested in him, because the Celtics can't trade for him until the off-season as they've already traded for a player who signed his current deal under the Rose Rule (Kyrie Irving) and you are not allowed to trade for a second Rose Rule player until the one on your roster signs a non-Rose Rule deal (Kyrie is up for an extension in the off-season). Rose Rule is an exception for extensions at the end of the rookie contract that sets the max deal for players who have received an MVP, DPOY or an All-NBA Team accolade at 30% of the salary cap. It's named after Derrick Rose because he was the first one to sign such a deal.
I know, I know way too much about the NBA.