As we all know banner is trapped inside the Hulk while he is in that state. Banner and the Hulk are one and the same, just the Hulk takes over when the radiation is released inside of him. Banner is always inside, just supressed. The cure I assume allows a little, just a little of banner to get through enough for him to speak, because he then recognizes Betty and shes in trouble. The personalities are different, but the man and beast, one and the same. As far as the speaking goes, they are tweaking as they go. My thoughts are he yells something at Abomb right before..........
Re: the part in the bold. I personally don't feel that is true and never really has been even with the 3 distinct Hulk personas we have seen in the books over the years (the 'merged' Professor personality would be the closest to that statement and even that was eventually revealed to be a different mind at work).
In his other 2 incarnations (Grey and savage green), just as Hyde was to Jekyll, the Hulk is Bruce's repressed emotions given form and thought of their
own. With the grey it was his nastier selfish side, with the green it was more basic and primal. But in all cases the Hulk personality is
not Bruce Banner, but parts of his ID grown into a
new personalities altogether. This is a point expressed in the very first issue and emphasised by how much they hated each other in the books - even now, with the personalities far more at ease with each others existence they are still well aware that they
are different minds at work.
Another way of viewing this...Someone utterly drunk
is one and the same as their rational sober self, it's just that while under the influence the drunk has far less inhibitions (and co-ordination, and manners...bladder control...you get the idea). However different they behave in this state though, the mind is still the
same person, no matter how drunk they get.
By making the Hulk a near mindless raging thing that Bruce becomes when the radiation kicks in, or as you described it earlier, like his being on a 'bad acid trip' you won't get the feeling this is a new personality on show. It's just Banner, under the influence of a very different kind of drug, one the 'cure' helps him to focus past a little.
If this is the case then the Hulk personality, in any form that the comic fans have known him, will remain unseen.