Our son is a huge Marvel fan, so when he told me wanted his room decorated with superhero's I had to really figure out how I could do it without making it look overdone. His room is also small so I had to find furniture that could also act as storage.
Budget and not overdone.
Bed and window valance - Walmart
Nightstand and Cube shelving from Ikea
Wall shelves - Bed Bath and Beyond
Comforter, red blanket, cube storage ottoman, storage bins, lamp, picture frames and rug, superhero masks - Target
Pillow sham and throw pillow - Disney online store
Canvases - A friend custom painted them for me
Wall sticker - Belvedere Designs