The image above is from the 2003 Games Day Espana exclusive release.
Apparently he is a renown explorer credited with the discovery fo Lustria (Warhammer Fantasy). Marco stands above the treasures he has plundered from Lustria, games, gold, etc. From a feather plumed hat, lizard skin cape, and blonde curls, there is a lot of detail in this model. (citadel finecast).
Marco Columbo was done back in 2003 for another games day. Its kind of odd that he would come up again for a new exclusive model. Just to be clear, the new model is a brand new scuplt, standing over his plundered treasures.