There is no connection currently, or maybe ever. The Japanese name for Blaze Accelerator is "Blaze Cannon". But since they went out of their way to make sure everyone knows "Frog the Jam" isn't a Frog monster, it really doesn't make sense that they would let a card with the same name be a part of a different archetype. Maybe in the future they will connect it, but as of right now their is no real reason for it. Ra is the Sun God, and the blaze Accelerator cards are for volcanics, so maybe they are related.
I understand why people play Nibru, but from my luck in over 300 duels story and ranked, I have never once had Nibiru in hand. I've never even seen it. I'll draw triple ash, all my other 1 ofs, but i have never even seen nibiru. Might just drop it, since it never makes a difference.
