Hello,
I will submit this suggestion for you. Keep in mind that the Hokages are only somewhat rarely given out, so this may not go through. As *ternative, if you desperately want these ninjas, I believe they are currently available in the Missions General Mobilization packs as extremely rare drops, so you could consider trying for them there. However, please be aware that the droprates for these ninjas from this pack is very low, so you may not get it if you try.
Thank and good luck!