Fallout 3 main menu with Fallout 4 trailer picture slide replacements and music from Synthetic Orchestra, his remake of the Fallout 4 trailer theme, replacer for Fallout 3 menu music.

Instructions: Backup your original files. Unzip archive. Extract to your Fallout 3 folder, Replace if asked. Done :)

Please stop downvoting. It was a dumb mistake that I forgot to upload the file, it is fixed now.