Outside of the "Bonus" there isn't really any great value in this promo.
You would be better off taking the prism / crystals out and replacing them with other items and then putting the prism / crystals in the mall so we can purchase.
There was a time when promo's were made for basic purposes. i.e A fortification promo that focused a majority of the items on Fortifying items... Pearl promo that most of the items were for recruiting heroes, or Rebirth items. Lately everything is such a jumbled mess with promos.
Sire suits should really be on the first tier of the promo not part of the "Bonus"
Considering you get 46 pearls if you do this entire promo, and even if you 3x it that is only 138 pearls. Considering most of the Heroes worth anything take somewhere between 250-350 pearls to pick up (400 if your really unlucky).
More examples of the recent promo's that are somewhat similar to this one with better returns on investment.