when will you be coming back vs When will you coming back

Some examples from the web:

• I'd change it to " when are you coming back" or "when will you be coming back" from vacation? Senior Member3,816 · Daxiaoaixad: Hi Goodman, I got your answer. So the time is very important. If it indicates the furture, one ...
• Omayra Caez. to West on Jade Photography · March 15 · New York, NY ·. When will you be coming back to NYC I need new pictures, will not do them with no one else smile emoticon. 8 Comments · Like Comment Share ...
• when would you like to travel? いつお乗りになりたいですか？ when will you be coming back? いつ戻られますか？ I'd like a return to …, coming back on Sunday, 日曜日に…に戻りたいと思っています. Newcastle, ニューカッスル. which platform do I  ...
• When will you be coming back to Nassau County? Thanks. Fran Kornweiss. Reply ↓ · October 29, 2013 at 3:18 pm · Marcelo Martins. Hi Guys, I met you at Central Park some years ago… and i`m still a fan! Thank you!!! Great job! Regards,

Some examples from the web:

• @enrique305 feeling better now? how's your hand? When will you coming back to Belgium?? #cantwait #followmaybe? #loveyourmusic. View conversation Hide conversation. 0 retweets 0 likes. Reply. Retweet. Retweeted.
• Mar 25, 2013 ... Im Kiara Crisostomo from the Philippines and i want to ask.. is your new album is also available in our country? and when will you coming back here? smile emoticon Thanks smile emoticon. Like · Reply · Mar 27, 2013 9:10pm.
• Jun 25, 2012 ... Ashly Smith 1 year ago. AUSTIN WHEN WILL YOU COMING BACK TO FT. WAYNE AGAIN????????? Read more Show less. Reply · 1. ▽ Report spam or abuse. Brittany Amick 1 year ago. Austin will you come to Indiana ...
• ameliagomez626 Te amo rohit 2mon. kikidelvery Hello how are you ,you handsome @rohitvbhardwaj 1mon. shevaminniekurniawati Hi @rohitvbhardwaj .. .when will you coming back to Indonesia. ..??? 1mon. santhy_naries Like you so much ...