There's a certain balance that one needs to maintain when entering Sage Mode. Any Sage Mode. The Sharingan disrupt balance because, as per Tobirama's description of the Uchiha, special chakra form in their brain that causes the activation of the Sharingan. The Sharingan would throw the balance...
No. At least in my opinion. The original Naruto manga (a one shot that was the foundation for Naruto as it is now) had guns and stuff like that and it didn't work out, hence the change from a more modern theme to a more traditional theme. I still have to wonder what Naruto would have been like...
I joined a month ago when the Registration re-opened (was waiting for a while for that to happen :sweat:) and I thought I would start posting now that I have free time. :)