As an MMA fan, I think the majority will also bet for Islam to win since he is the bigger man in the octagon and can manage to takedown Volka which is his key to winning. Particularly they can choose Win by Submission. Your offer may not be taken by anyone actually. They can bet on thier own.
So many MMA blogs already and there are podcasts about it including the popular Joe Rogan's, that would put your blog unnecessary actually unless you offer worth more than they know.
There more features user will be always to add predictions and top.5 every month will earn money from the site.
There will be manypredictions/you can track history of others/ follow top people.
i think highly skilled mma better can beat the casino if he can know