Unless Sharon can pull off a POV win, I think the boys will evict her and easily beat Sheila in the Final HOH comp, so the F2 will be Adam and Ryan which will be just as dull as Season 5 with Drew and Cowboy.
Interestingly, in 7 years of this game (first season was audience vote control so it doesn't count) the F4 HOH winner failed to make it to the F2 FOUR times (Monica in Season 2; Robert in Season 4; Janelle in Season 6; Zach in Season 8 ) and if I were Natalie, I would note that those are all even numbers (lol) so Ryan is likely to make it to F2 in this year (Season 9, an odd number).
No but seriously, the odds are slightly against Ryan in the sense that the F4 HOH has made it to F2 only 3 out of 7 times in the past.
But that's just looking at the cold numbers, not the dynamics involved. A closer inspection suggests that things are looking VERY good for Ryan...
See, ALL three F4 HOH winners who DID make it to the finals, did so with an alliance partner in the F3 (Danielle had Jason in Season 3; Drew had Cowboy in Season 5; Boogie arguably had Erika in Season 7) and Ryan certainly seems to "have" Adam.
Also, of the F4 HOH winners who failed to make it to the finals, NONE of them had a real alliance partner in the F3 (Will and Nicole were against Monica in Season 2; Jun and Allison were very much against Robert in Season 4; Maggie and Ivette were very much against Janelle in Season 6; the Donatos were very much against Zach in Season 8. )
1) It's important get to F3 with an ally. NO ONE has made it to F2 in the history of BB without an ally or a pseudo ally (Will in Season 2; Erika in Season 7) in the F3. The idea that a lone person can just "win" his/her way to the end has yet to happen -- it has NEVER been a successful strategy on BB. Even Janelle -- biggest competition beast of all time -- failed to make it to the F2 in both Season 6 and Season 7.
2) Ryan will probably get to F2 and win the whole thing. I hope Sharon and Sheila can buck the trend (with Sharon winning POV and evicting Adam; in which case the trend will be on their side since the two girls will arguably be an alliance of 2 against Ryan) but I'm predicting Ryan to go the way of Drew and win BB9. Ryan or Adam are most likely to win the Final POV (and evict Sharon) and Ryan is pretty much on good terms with everyone in the jury house.
Note that the three F4 HOH winners who made it to F2 ALL ended up winning the big prize. If Ryan gets to the F2, I predict that statistic will go four for four.