And at last, the final:
Black Dragon (1) 3
T-Rex (2) 0
We have nr. 1 and 2 in the final, and still there's some surprise, as many would have expected the green dragon and the archdemon to be protagonists of the final fight. Alas, the final is not up to the tournament and offers little leeway for surprises. The Black Dragon has overall better stats, only health and initiative being equal. Actually the BD, being faster and immune to primal fear, could just finish off the T-rex with RoF keeping distance, but even if they just slug it out, considering the BD has 20% resistance to physical damage whereas the T has 10% vulnerability to fire, the result is quite settled. On average the T does from 84 to 126 points of damage with a critical of 189, but the BD ranges from 154 to 182, critical 273. So in a slugfest it's likely the T goes down in the fifth round. The t-rex could try just defending to raise his DE and count on retaliation but it's extremely unlikely that would change anything - and there's still RoF to take in account.
So that was it, we have a winner, many thanks to anyone who read and/or commented on this little experiment, should anybody wish to pick up the idea and write down the hypothetical results of a round robin tournament, a tournament based on leadership rather than single units, a "double", whatever, I would follow it with curiosity