Well, it would explain the premature release of Pegasis and Bahamdia, two starters being released a mere two weeks after a previous release.
But as Dranzer has said, I don't see Beyblade coming to a complete cancellation. I can imagine another Hiatus, mainly due to the system change.
However, January is the start of the Winter Anime season, Beyblade could easily be cancelled then, and they may use the extra three months for full planning of a new Beyblade Anime and Manga to release in April's Spring Season. It may seem unlikely, but it's possible, providing the sales of the DX Sets, Pegasis, Bahamdia and the unknown BBG-28 all do well over the holidays.
My opinion; don't give up and assume its all over now. People did that at the end of 4D and it proved wrong. Just wait for the confirmed information.