You may not know it, but somewhat years ago id released what was the first alphas of Doom! This mod aims to basicly, fix up the alpha. Make it into what it might have been. This is more of a side Project so don't expect "Weekly Updates". So for you Doomer's out there check this shit out! This mod is still in it's "Alpha" Phase :P But if you are interested in Doom Modifications, then Check it out.
Re-Working the alpha, one map at a time: Moddb.com