[Matrixbeast]

Den-O Gun form is purple.

Anyway, I don't see it. Riders changing colors isn't anything new and the comparison to Den-O stems solely from the fact that Den-O and Wizard both have 4 differently colored forms. We know that his weapon has a sword and gun mode, but it feels closer to Kabuto's Kunai gun rather than Den-O's Dengasher.

And every Heisei era main Rider has a super form.

The primary reason why I don't see the resemblance to Den-O is because while his chest may barely resemble Sword Form's, the rest of Den-O's forms are wildly different not only from Wizard's, but from each other as well.