Well does he?

He's his own separate character that co-stars in an ongoing series and has co-starred in what, two minis now? So yeah, he deserves as much of a page as say, Boulder/Butterball does, certainly.

" no...he's an alternate version of Deadpool...if does deserve one then so does every other alternate version of every character "

As far as I know, being in Earth-616 from another universe doesn't qualify 'Headpool' to receive his own page.  He (or it) has had a smaller history than many other AU characters who haven't received their own pages.  Then again, I don't approve of the cast of Mutant X having their own pages... 
 
We'll see what some of the mods think.

What about all those *insert marvel character* 2099s then?

That makes sense. Sorry, not familiar with how the Marvel Mulitverse works.

Any character that gets any storyline development even if they are only featured in a panel or two, but are and will be be known to have development should have their own page.
 
Thats as simple as that.

Is a different character regardless of been deadpool from another reality. It is not our Deadpool and been a separate factor in 616 it becomes its own thing. So yes! It deserves its own page :D 
 
Z-Headpool FTW :D

I'm thinking that all of the Deadpool spin offs don't need to have their own pages.  Li'l Wade, Major DP, Lady DP, Zombie DP... it's all getting a bit silly really.  They're essentially the same character but from different universes.

Seeing as how he was an Alternate reality version of Deadpool who is now in the current comic universe...yes, he does. 
 
If he was still in the zombie universe it would have been different, and I'd say "no he doesn't" however since he's in the 616 universe then yes I would have to say "Yes". So as long as all these alternate versions of Deadpool (Major Deadpool, Lady Deadpool, Kid Deadpool) stay in their universe then they don't need their own page, but if they move into the current 616 universe then Yes they need their own page.