What are some of Masamune Shirow's most recent works? Is Masamune Shirow working on any kind of manga?

I'm still waiting for an end for Appleseed and I won't mind to see something like a new Orion or Tank Police Dominion.
His work chronology listed on his official website, shows some of his recent works, and plans for near future. He doesn't seem to have any plans for the series you mentioned.

2013/09/11  SEVEN TRAPS : Auto fighter-bomber SUZUMEBACHI (Hornet) (Monthly YOUNG MAGAZINE)
2013/09/20  INTRON DEPOT 6 BARB WIRE 01 (Art Book)
2013/09/27  W-TAILS CAT - A STRANGE PRESENCE - Episode 06 (Stream)
2013/10/09  SEVEN TRAPS : Multipurpose multi-legged tank unit HONOOARI (Flame Ant) (Monthly YOUNG MAGAZINE)
2013/10/10  Cover Girl Fragments Vol.7 (comic Anthurium 007) 
2013/10/25  W-TAILS CAT - A STRANGE PRESENCE - Episode 07 (Stream)
2013/11/09  Cover Girl Fragments Vol.8 (comic Anthurium 008)
2013/11/xx  INTRON DEPOT 7 BARB WIRE 02 (Art Book)
2013/11/30  Ghost In The Shell ARISE border:2 Ghost Whispers (Movie)
2013/11/30  Shirow Masamune Calendar SABER TOOTH CATS 6 (Calendar)
2014/01/xx  GREASE BERRIES 1 (Art Book)