Miss Buxley, take a letter while I chase you around the desk. Use the Doctor Doom stationery. And mail it in a Spider-Man envelope.
The character images above may have been enlarged for enticement purposes, but it seems to me that, like someone who dumps a ton of milk into their coffee, you’d be getting some stationery with your comic book character.
Use whatever white space you can find to write your letter — maybe a fan submission to FOOM. Post it with a Marvel sticker. Cancel it with a Marvel hand-stamper. Might as well make it a 100% Marvel affair.