Whoops! Point taken B-Kun. Thanks!
Consider this though - during the Buu saga, when Trunks and Goten were aligning their power to one another in an attempt to start the fusion training, Goku mentioned to Goten that the reason he couldn't match Trunk's power was because Trunks was older, so naturally he would be slightly stronger. It would seem that their power increases in a linear fashion according to their age - in conjunction with the training that they would have most probably undertaken during the Z and GT series.
Therefore, if we "fast forward" to the GT series, the theory of strength rising in accordance with age would make Goten and Trunks stronger - hence producing a stronger character fusion. They may not have reached the levels of their fathers, but am i correct in saying that Goten and Trunks were actually full-powered Super Saiyans?
If so, they are already many steps ahead of their fathers when they were their ages. in effect, its actually a "head start"
How was Goku to know that fusion would be of no use? Goku himself was surprised during DBZ that Trunks and Goten could reach SSJ3 - which is far beyond what they could reach individually. If you take into account the ages of Trunks and Goten and the levels they reach as CHILDREN, never mind as adults, then i believe that they would have been more than a match for any villan in GT as Gotenks. As for Gotenks himself, who knows how much stronger he could have been?
ItsAll Good
