First off, a lot of anime is 13 episodes. It's a standard episode order for television since it services 1/4th of the calendar year allowing you a season of coverage. It's not odd.
The reason for the production of the Beywheelz anime, other than the straightforward fact that those involved like money, is that it bumps up the episode order for cycle 3 of the Beyblade Metal ___ franchise. As 4D concludes in Japan this April this leaves Nelvana in a hard spot. They sold the third cycle of Beyblade as a 51 episode order. The problem is there's 26 twenty-two minute episodes, and 25 eleven minute episodes. Editing 2 eleven minute episodes into a single twenty-two minute episode leaves you with an additional 12/13 episodes, bringing up the total episode count to 38/39. That leaves them short of that 51 episode order. This is where the 13 episode Beywheelz anime comes in. Produce that, and voilla you now have 51 twenty-two minute episodes.
You also criticize this series existence based on Hasbro's previous attempts with the Zoid franchise, well there's huge differences between Beywheelz and Zoids. First off, Hasbro has no hand in the actual production of the Beyblade anime series. Hasbro Studios (their entertainment company who produces TV shows, and movies) has absolutely nothing to do with the creative process of Beyblade. Beyblade's produced by Nelvana, TV Tokyo, Takara Tomy, Synergy SP, and Tatsunoko Productions. The only thing Hasbro's probably bringing in with Beywheelz is direct financial support. Story planning, and the rest will likely be handled by the same people who always handle the anime.
Also, having a Beyblade series actually created by Hasbro probably wouldn't be that bad in the terms of television show quality. Hasbro Studios is a
critically lauded studio so they produce some great shows. If Hasbro produced a new Beyblade entirely themselves it probably would be a better product. Hasbro doesn't half-carp their own internal shows, and tend to hire a lot of really talented people to direct, write, animate, and act in their shows. I'm not saying Nelvana doesn't, but I doubt the budgets are comparable.
I'm not from the future so I can't tell you if Beywheelz will be measurably worse than your average vanilla Beyblade anime episode. The franchise's TV shows were never high art, and never intended to be so. Yes, the concept is a bit far out, but this
is Beyblade after all. Silly concepts is kind of a larger part of the franchise.