I don't think so, but with this kind of stuff you always have to look at what they have to gain from an extra year at college level. Banks is projected 1st rounder, but I imagine he goes in mid 2nd round.
I will really admire Verrett if he decides to stay. I think right now he is a lock for 2nd round with possibility of 1st round. For a CB, that is not a huge incentive to wait another year, comparing initial pay grade difference of 1st v 2nd rounders and liability of injury or under-performing in senior year (i.e. lower draft stock). With how our team looks for next year, high likelihood of increasing stock with similar performance on a better team, but there is still risk of injury.
Personally, I would go while I am a hot product, but I don't think he will. Too much potential to increase stock to 1st rounder for next year, plus CBs are not one of the positions most likely to face season ending injuries. Nothing indicates to me that he will tryout, but with a season like that it is tough to give a definitive answer.