For the ones who don't have him: Great! You got a new ninja! He's meh when it comes to play. Not the best. Not the worst. You got free coupons! Not only for monthly logins, but also because extra ninjas! So sweet!

For the ones that do have him: Sweet! Another 4 star! Maybe he'll actually do some heavy damage now! Perhaps we don't have to worry about Jiraiya Sag-*snickers*
No. Use Sage Jiraiya over Sannin War. But hey, don't complain about it.