Here is what I’ve gone with for my RetroPie Splash Screen. Initially I just had the jpg file of the image, but now I use a video of the words and logos appearing one by one set to the theme of nba jam. The Pi is installed into a NTSC SNES, hence the name.
Fonts used were Sega’s, Nintendo’s, Atari’s, and the Mame logo.
Used photoshop to create the background image of some games.
Used png files pulled from the net for the characters.
Also have one for Kodi that leaves a space for the menu bar when the program is loaded.