Yeah, but for that, we would need a bomberman enemy... Or we can find a Mario-themed bomb-ish song... That's why I suggested Mario Party

Yeah, true enough I suppose. While Bomberman music would be a funnier choice of theme, everything considered, there aren't many iconic or memorable things in Bomberman that would make a good egg trigger (Recognise any of this shit? Yeah, case in point).
Plus, Killer Bullets are basically rip offs of the Bullet Bills (known as Killers in Japan, dohoho), so it makes even more sense to make a reference to that.
Besides, I'll admit that I'd be the happiest little elf if Smash's song suggestion got in instead. So yeah, if an easter egg does make it in, you have my vote! That song is all kinds of happy times.

On the gameplay side of things, if you were to get rid of the little death pits, why not just replace 'em with a big massive moat-like ditch that runs below the sides of the central building's walls? Then you could replace the little pathways that lead into the corridors with bridges, or something too.
It'd give hyper bomb more of a meaning, with the whole 'death from above' thing going on, and it would be more shiz to explore, maybe even continuing on to the entire bottom of the central area. Like a second floor!
Unless this is all just a horrible idea that'll overcomplicate things, I dunno.

tl;dr: I'm a crazy foo' with crazy ideas.

Lagman, please refrain from posting picture-only replies in these forums.

And I suggest taking the idea of a new easter egg to another thread as this one deals more in balance suggestions than non-Mega Man related aesthetics.

I think Bomb Man has been discussed enough now, so I'd like to bring up some stuff about MM7CLO.

The rain is a huge problem for two reasons. It produces lag, and the wind sweeps players off into pits because the direction can't be seen. This results in being forced to stick to areas under roofs, or risk running outside to somewhere else, which isn't good for gameplay. What I suggest is keeping the rain effect to the skybox and getting rid of the annoying wind. It might not feel a lot like MM7, but it will sure help the map be more playable.

It's still annoying when turning around in the rain, though.

You do realize snow already exists on Cloud Man, right?

on the subject of Cloudman, better ideas for the weathers:
Sunny (When hit by fire or light weapons): Causes a brief flash and returns weather to "normal"
Rain (When hit by water weapons or any weapon during "normal" weather): Glass platform disappears, wind pushes players while they are not standing on a surface, sometimes a lightning may happen and reveal the glass platforms for a brief moment.
Snow (When hit by ice weapons): Glass platforms are perfectly visible, movement becomes a little slippery (like in MM2FLA) and snowflakes may hinder player's sight.

EDIT: Because the problem on MM7CLO is (and was) never the layout, but rather the fact that the wind is the greatest enemy at all times.