I am just curious what people think will happen if 5E fails to unite the customer base (which is its design goal). Let's say it does about as well or a little better/worse than 4E (and the split basically stays where it is); what direction do you think WOTC will or should go from there?
/edit nevermind.
I doubt it will fail. And here's why: I don't think the base is as "divided" as some people think.
The theory is that the fan base is split into three groups: a large group of 4E players, a large group of 3.X/Pathfinder players, and a somewhat smaller group of earlier-edition players. But we are all tabletop RPG players, and there is a lot of overlap in our materials. A lot of people who play one edition also buy and adapt material from other editions to use in their game.
So as long as WotC focuses on QUALITY OF PRODUCT, they cannot fail. As long as the books are well-written, with imaginative adventures, clear rules, and quality artwork...we will buy them. We might buy them them because we are curious, we might buy them because we are switching to the new 5E, we might buy them to adapt them to our older system of choice...but if the quality is there, we will buy it.
Would this be a good time to mention that I have Blue Oysters in my undersea game?...veterans of a 1000 edition wars.
That sums it up nicely. Since 1995, I have been running online games; both play-by-post and chat-based. My first online game used the 1e ruleset, in a day when 2e ruled the roost. My next PbP switched from 1e to 3e midstream, a task made easy by similarities in the rules and the Conversion Manual.D&D next will never unite the base cause the base is old and often happy with their game.
What happens if 5E fails to unite the base?

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.