In the 25th, and final, episode of Mobile Suit Gundam: Iron-Blooded Orphans, after the ending theme played and the credits ran, there was a picture showing the Tekkadan, the protagonist’s group logo, and “2016年秋”, meaning Fall 2016.
The subsequent picture shown reads “Tekkadan Futatabi”, or “Tekkadan Again”. This would seem to indicate the return of the iconic Tekkadan in a second season!
The anime can be viewed legally in South East Asia via the Gundam official YouTube channel, GundamInfo, on Sundays at 8pm (Japan Standard Time).
No further information regarding the second season has been released at this time of writing.
You can watch the last episode, as well as the announcement after the episode has finished, below: