Alzrius said:
Between the loss of Dragon and Dungeon, and now the end of Dragonlance, things have reached a fever pitch in the (well-connected) D&D community. So then, let's ponder the worst-case scenario: what if 4E comes out, and doesn't use the OGL or anything like it, reverting to a totally closed-content game.
If 4e didn't use the OGL, but was substantially similar to 3.5e, nothing much would change. The third-party producers would continue to produce compatible material.
If 4e didn't use the OGL and was substantially different, the market would split, temporarily. The lion's share of gamers would follow WotC, while a minority of more vocal and hardcore gamers would stick with 3.5 and the OGL publishers. In time, however, the number of people playing this 'older' edition would dwindle, leaving 3.5e as dead as 3.0e is (which is to say, not gone, but definately a minority interest).
Other games that happen to be based on 3.x mechanics would go along on their merry way, largely unaffected by all of this, although the publishers may at some later point elect to move to a different system, to close the system, or whatever.
(As far as the worst-case goes, I'm not considering D&D ceasing production altogether. Hasbro wouldn't sit on it unused; they'd sell it, and whoever bought it would want their money's worth, so there'd be more new material. I just don't see the death of D&D happening...at this point, anyway.)
I think that's a mistake. Hasbro are known for sitting on IP. Moreover, the D&D brand still has massive value, for licensing to video games, movies, TV shows, and so on. So, I wouldn't be at all surprised to see them cancel the D&D game but refuse to license or sell it.