Who will Robert Strong/the Mountain fight? (ASOIAF theory)

Turns out Audacity was programmed by actual magicians, cos that's the only way this audio's even slightly tolerable. Also happy April fools - I thought the most subversive thing to do would be to upload a kinda sorta serious theory that has a fool in it and also includes a high-quality belch. Anyway, I came up with most of this theory independently, but there's nothing new under the sun, so here's some links to a couple of Reddit posts I looked at: One on the Trial by Seven - https://www.reddit.com/r/asoiaf/comments/nh6s3v/spoilers_extended_cerseis_trial_by_seven/ One just on the regular trial - https://www.reddit.com/r/asoiaf/comments/1ch70e/spoiler_all_who_will_fight_ser_robert_strong/ There was also a westeros.org thread but when I tried to copy the link across my antivirus told me it had phishing in it so I guess you'll just have to find it for yourself.