How many suits are in LEGO Batman: Legacy of the Dark Knight?
126 confirmed suits across the 7 heroes (RPS count). Marketing lists '100+ suits and outfits' for the base game; the 126 figure includes DLC and promo suits.
Rock Paper Shotgun's full tally lists 126 suits across the cast: Batman 43, Robin 15, Nightwing 13, Batgirl 14, Catwoman 14, Jim Gordon 14, Talia al Ghul 13. The 126 includes ~21 DLC suits (Arkham Trilogy, Batman Beyond, Party Music — each adds one per hero) and promo-tied skins like Golden Age, Golden Knight, Dark Knight Returns, Black Lantern and Dark Knights of Steel. Marketing rounds it down as 'over 100 suits and outfits'.