Looks like bandai will keep it as initial 7 sword, not with GN sword blaster. This make me bit worried, because we can't sure if someday bandai will release RG 7 Sword G, and whoever buy RG 7 Sword already will be doomed by that if it happen.
I bet Bandai is saving the 7 Sword/G version in RG and also the orange, Inspection version as a Premium Bandai release later. It's so so obvious that is probably what they're most likely intending to do.
The sword parts might not be reused from the HG ala Strike Rouge, since there appears to be at the very least, new detail to help it fit better with the RG aesthetic
Don't go for it!!! Better wait for other rg gundams.