they wont add any of these (most likely), but some better suggestions are...
Adding the death that I deservioli
Adding Snick as a playable character (youd change characters by pressing C and up at the same time)
An easier way to access bosses
The dragons lair level
Different clothes (youd change your clothes by pressing C and down at the same time)
Fixing the audio for the rank screens (it only plays D rank audio)
Give the noise his own rank screens (they only made a D rank to S rank for noise, no P rank.)
The Mansion level
Also, you could either use sprites and coding from other mods (with permission, of course.) for pepperman and vigilante if you want them to be playable.
That's all, folks!