I dont like how Grass/Fairy looks when dealing with Toxapex for Sun, or Celesteela/Skarmory for Sand. Those seem like key mons that have always been a huge stop to those team archetypes and this mon should surely deal with them(?)
The typing that deals with all 3 of those mons in my head is Electric- I think its an underrated typing for this mon that hasnt really been discussed yet.
I think Electric/Flying could be potentially be a very good typing for this mon. If we go down the route of aiming to create a setter for Sun and a special breaker for Sand. Electric/Flying pairs very well with Excadrill as an offensive duo, since it has the typing to take out Grass, Flying, Fighting and Water types that give it the most grief such as Celesteela, Tomohawk, and Tangrowth. It also dodges ground types that threaten both Tyranitar and Excadrill like Lando-T and Hippowdon, and are able to be dealt with in the movepool stage. And for Sun teams it could be made to deal with the rain matchup happily- as a setter, it would be switching into Pelipper basically for free, abusing Koko's terrain and walling Hawlucha, while threatening half the team with its Electric stab. And outside of a rain matchup, it should be able to nuke bulky waters such as Toxapex and Suicune, and fares better than the Grass type option thanks to the improved hit against Toxapex.
Electric/Flying has the benefit of not wanting to be put on a rain team (as long as it isnt given hurricane/thunder), since its typing stacks up heavily with Pelipper and Koko and to a lesser extent Hawlucha, not breaking anything Hawlucha/Koko doesnt already.
This typing has the disadvantage of seemingly not taking advantage of any of the innate benefits of Sun or Sand off the bat (no STAB boost or defensive raises, doesnt lighten its own weaknesses or anything) but I think the typing could mesh well and its utilization of weather can happen in the ability/movepool stages.
I guess an interesting take on things is thinking of Sun as a beneficiary to a Sand team, since it covers the water weakness for the team while balancing 2 weathers also allows you to reset weathers and get more turns of each. Electric/Flying in Sun has the ability to resist everything that Tyranitar is weak to outside of Fairy, which could be abused by other common Sun team mons or Excadrill.
What would this do that Zapdos couldn't? What eould need to be different with this typing in play, given that Zapdos can do that already. I doubt Zapdos with Drought is something that sun is missing. If