from Gamerbytes 
 
"Speculation as to why Doom was pulled revolves around rights issues involving  id Software's acquisition by Zenimax and the XBLA title being published by Activision. " 

Outrun Arcade is also being pulled at the end of this year due to licensing issues. 
 
 
Edit: Supposedly the game file is not up for download after you access it in your download history, so if you delete it you can't redownload it.

I was actually sort of vaguely considering buying this one day, so I am displeased. But whatever, everybody owns like 6 copies for the PC...load up the WAD in Zdoom, you are rocking.

meh. who would want to play it on xbox anyway?

" meh. who would want to play it on xbox anyway? "

Can't they just republish it under id software?

" Can't they just republish it under id software? "

Has any game that has been pulled from XBLA or PSN download service ever been "republished" and brought back on the market? 

Too many ports of Doom to care. If I wanted to I would bust out the Doom 3 limited edition disc on the Xbox and play it that way. The real question is where's Doom 4?

meh. who would want to play it on xbox anyway?

" Has any game that has been pulled from XBLA or PSN download service ever been "republished" and brought back on the market?  "

Damn just found out thru someone over at the joystiq forums that if you delete the game off your hard drive that it might not be up for download in your download history. 
  
" I just migrated my Xbox over two days ago and when you click on Doom in your history it says "File is no longer available for download". So basically if it gets wiped from your hard drive you're SOL. "   
 
So basically don't delete it if you have it on your hard drive already

They might have to re-port it. Activision might own the rights to that specific port. Hell, Activision might own the right to publish any version of DOOM on xbla.