Is the two year gap you guys are talking about between The Wolverine and DoFP or The Last Stand and DoFP?
The 2 year gap is mentioned at the end of The Wolverine and is essentially a textual moment in between the films two endings.
Wolverine prepares to fly home from Japan after the climatic battle---2years later---Logan is in a different airport and this is the teaser for DOFP. So the 2year gap is still within the confines of the film. That is where another solo outing could go.
Anyhow, I think we can all agree that this upcoming film should be called...
X-Men Continuations: Wolverine - The Wolverine 2: Wolverine Returns
It's only logical.
I thought that 'Begins', 'Age' and 'Dark' were the new buzz words for sequels.
The Age of Wolverine Begins Darkly