Obekpa will be a first round pick this year. His shot blocking ability is rare to find and valuable in the NBA.
Jordan has FINALLY appeared on his first mock as #49 for 2016. Chris jumped all the way to #34 on the DraftExpress 2015 mock after the recent buzz. I think the only way he stays that high is if he measures in at 6'10 or near it. If not, even with a stellar season, guys like Georges Niang (currently #39) will pass him with deep runs in the tournament.
2015 is an awful year for Chris to enter the draft. There has never been so much size that I can remember, and this is one of the best international classes in some time. 19 of the top 21 picks in the draftexpress mock are between 6'6 and 7'1 and 13 of them play PF or C. Only one (PG Tyus Jones) is shorter than 6'5. This also follows a draft that had a ton elite PFs and centers taken in the first round.
He won't be ready to contribute to an NBA team in the 2015-2016 season, so it comes down to his height. Is he worth stashing for a year or two while he develops further fundamentally and physically? At 6'10 or near it, yes. At 6'8...teams will likely take one of the many similarly sized NBA ready wings or bigger forwards and centers. I think Sean James is the only comparison that can be made to Obekpa and he went undrafted at 6'9 with crazy shot-blocking stats (5.29 average over three year career) and a more refined offensive game (career 38.9% from three, 74.6% from FT line, 11.8 ppg, 7.5 boards).
As for Jordan, his situation is much bleaker for 2015. There have been a ton of PGs taken the past two seasons and the league already has multiple stars at the position that aren't going anywhere for years. The demand will be extremely low, and it is very likely there won't be more than 3-4 pgs taken in the first 35-40 picks. That is bad news for Jordan, who has almost no chance to surpass the three ahead of him: Mudiay (top 3 pick), Tyus Jones (lottery), and Andrew Harrison (late first/early second). It will also be nearly impossible for him to pass over Marcus Paige (beast) and Delon Wright (does it all). The off the court questions will plague him, but playing off the ball this year will take away his chance to make up that ground. He is already dangerously close to being labeled a combo or a SG that can play some point. If you look at the next tier of guys like Yogi Farrell, Olivier Hanlon of BC, Vanvleet of Wichita State, Juwan Staten of WV, Kasey Hill of Florida, Shannon Scott of Ohio St.
I think both of these guys can play their way into the first round of 2016 if they stay and develop. Both guys are in a better position than Sampson was/is IMO. Jordan's ticket will be his defense. He has the potential to be a lock-down star on that end. He has to show he can run an offense and shoot for a high % of his jumpshots. Out of the second tier of PG draft prospects (guys like Yogi Farrell, Juwan Staten, Shannon Scott, etc.) he is probably the worst shooter right now. I hope like hell that changes for SJU's sake.