Technically no. Ven's heart was ripped out ant given form. He then connected his heart to Sora's. So technically, there should be darkness; just not as much as there was before.
What is this?
Of course Ven's heart was pure light, when his heart was ripped out by Master Xehanort Ven's
darkness got extracted
completely and a piece of his heart was also cut off to form the core of Vanitas's dark heart.
So the answer is
yes, technically, Ventus was the same as the princesses and could be considered a "prince of heart". However, it's not even proven that this title exists and furthermore Ven's pure heart was unnaturally made.
When Sora connected with his injured heart in the beginning Sora didn't give Ven any darkness.
Namine_x said:
Hmm... I still can't help to think what would happen if Ven's heart were to be given back to his body. Would Vanitas be locked inside him as the "remaining darkness"? I thought Vanitas was defeated therefore Ven's extracted heart would remain pure when give back to his body.
Before Ven's heart can be given back to its body it must be healed from the grave wounds the destruction of the x-blade inflicted on it, which was the reason Ven's heart had to plead with Sora to sleep inside his heart.
What happened to Vanitas and by extension the small fragment of Ven's heart that was the core of Vanitas's heart is not completely confirmed.
It could be that after their fight when Vanitas was defeated that Ven re-absorbed the fragment of his heart and therefore got his darkness back (and Vanitas got therefore absorbed too).
Second possibility would be that Vanitas and the part of Ven's heart which was the core of his was fully and utterly destroyed...then there would be no more Vanitas and Ven's heart would indeed still be pure light.
Third possibility would be that Vanitas still exists somehow somewhere and his dark heart is as heavily injured due to the x-blade's destruction as Ven's is.
If Ven's heart would really remain pure this could open up paths to more plotlines in the future, but it is way to early to speculate on this because we don't know what the real status of Ventus is at the moment.