The shape looks like Suriname, though not located in a geographically correct place. I would be shocked if BW began GEO Venezuela traffic even as they have drastically scaled back their POS CCS. Given Venezuela's extreme economic problems I doubt that the Guyanese living in eastern Venezuela will be able to afford air travel, and will continue using overland routes. That being the only viable Guyana Venezuela market.
So here's my Sherlock moment (and remember I had the benefit of seeing this larger):
1) If you look at a map of Suriname, the shape shown is wrong.
2) The shape or the coastline of that land mass is actually shapes exactly like the North Coast of Venezuela south of Trinidad.
3) though the shape of the mass is not Venezuela in its entirety, it seems they've only shaded in one part of Venezuela for the purposes of this teaser.
4) the location of the point to point doesn't mean anything because from the Guyana side the dot is nowhere near Georgetown, so it seems to simply be loosely showing a "link".
Private message me your e-mail address and i'll e-mail you the full sized photo if you're interested, but that land mass is simply a partially shaded in Venezuela, in the correct location as well (south of Trinidad and west of Venezuela).
I agree that a Suriname to Guyana route sounds more feasible, but to me there is no doubt this is depicting a Venezuela to Guyana route.
“The moment you doubt whether you can fly, you cease for ever to be able to do it.” J.M. Barrie (Peter Pan)