Metal Gear and Castlevania
Pair by company, genre (Action-adventure), projectile users, year (86-87), mature content.
• Couldn't break: Assassin's Creed · No More Heroes · Resident Evil · another Konami rep (Bomberman and Ganbare Goemon are good indicators that there won't be Frogger and Silent Hill)
• Could break: Ninja Gaiden, but minimalism could refuse Hayabusa. I think Musou rep in Ultimate (Hyrule Warriors) is a disadvantage (not a teaser).
Street Fighter and The King of Fighter
Pair by genre, birth on arcade, author (Takashi Nishiyama).
• Couldn't break: Ikari Warriors · Psycho Soldier · River City · Samurai Shodown · Tekken · Virtua Fighter
[Trivia] Ikari Warriors, that appears in Terry's stage, is another arcade game heavily influenced by SI.
• Unbreakable: I think a fighting rep can't come before Heihachi.
Final Fantasy and Dragon Quest
Pair by company, genre, Japanese preferences.
• Couldn't break: Mana · Super Mario RPG · Octopath Traveler
• Unbreakable: since Hero represents the concept of JRPG heroes then Sephiroth, Chrono Trigger or Kingdom Hearts seem unlikely, and Tales and Xenosaga seem too for additional reasons (see Pac-Man) ; I think that minimalism will refuse Tales, Xenosaga and Ys.
Bayonetta and Persona
Pair by owner, style (contemporary gothic, affiliated with darkness, invocations, glasses, guns), recent rep (2009-2016), mature content.
• Couldn't break: Astral Chain · The Wonderful 101
• Could break: Devil May Cry, but minimalism could refuse Dante.
Sonic the Hedgehog and Mega Man
Pair by genre, style (blue cartoon with robots), heroic, alternatives to Mario which were serious.
• Could break: another Sega or Capcom rep.
AND
Banjo-Kazooie and Minecraft
Pair by company, occidentality, explosive users.
• Couldn't break: Cuphead · Bethesda (Vault Boy is a good indicator that there won't be Doom) · Raving Rabbids · Rayman · Shovel Knight · Simcity · Undertale
• Could break: Halo, but minimalism could refuse Master Chief.
OR
Sonic the Hedgehog and Banjo-Kazooie
Pair by genre, by style (cartoon with animals), fast, exciting stories about Nintendo, have Mario Kart-like games, Melee catch-up, alternatives to Mario/DK which were serious.
• Couldn't break: Raving Rabbids · Rayman · another Sonic Team rep (Knuckles and Tails are good indicators that there wont' be Eggman).
• Could crash: Crash Bandicoot, but minimalism could refuse Crash.
AND
and
Mega Man and Pac-Man/?
Pair by Man-mascots, Sm4sh newcomers, item users.
AND
and ?
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Bonus: Capcom + Project X Zone sub-pair
• Couldn't break: Resident Evil · Virtua Fighter · any Bamco rep (Gil and Heihachi are good indicators that there wont' be another Namco rep)
• Could break: Devil May Cry · Monster Hunter · any Sega rep.
[Trivia] Hideki Kamiya refused to include Bayonetta in Project X Zone 2.*
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Pac-Man and Space Invaders
Pair by year (78-80), style with pixels & sprites, birth on arcade, video game pillars.
• Couldn't break: Galaga · Tetris · another Bamco rep (Gil and Heihachi are good indicators that there wont' be Digimon, Souls or Tales).