So why did gang go to Shi No Numa. I think that the meteor of 115 wasn't the big purpose.
Instead I believe some experiments were transferred from Der Riese to Shi No numa, this would also explain the boxes labelled 115 in the starting hut but out of all I think the Wunder waffe was transferred.
Assuming that I think Richtofen went to pick up the DG-2 and this is how I think it happened. When escaping from Der Reise Richtofen brought his test experiments, Dempsey, Nikolai and Takeo with him. Explaining why in the trailer Dempsey says something like, "We're here," followed by Nikolai saying, "finally," Now this theory makes sense because wunderwaffe first appears in Shi No Numa.
So what do you think?