At this level and early stages in could have a wide range of cards most of which your beating.
he could have TJhh JQhh KJhh AJhh , total air , small chance 33 and with it being so early and still a lot of dead money he could even have been donk calling aj,kj , jq etc or he may have a missed draw.
Obviously if he has a missed draw there isnt much value in 3 betting the river but there are plenty hands he could be doing this with that you beat so i 3bet shove river for value.
If he has JJ J9 J3 99 , as amh says too bad, thats what the next tourney is for
if you were the opposition player to wing in this situ marky,and did hold pkt JJ,how would you play it? Re-raise preflop? bet out turn? cert reraise the turn j?
Id flat the raise preflop with JJ/99 being so deepstacked.
If i have 99 on the flop i would reraise hoping they had an overpair and making them pair for their draws.
JJ on the flop i probably happily flat call as if i 2bet and he 3bets well theres plenty that could be beating me and it would get messy with some tough choices and id be hoping to control the pot and disguise my hand a little , get value on turn and river.