HTC published a list of its phones that are due Android 4.0 upgrades and it appears that most of them will get it within two months.
Note that Sensation, Vivid and Amaze have already received their upgrades. Not much else to say, here’s the list:
HTC DROID Incredible 2: will be known by end of August
HTC Amaze 4G: May-June
HTC Desire S: June-July
HTC Desire HD: July-August
HTC EVO 3D: June-July
HTC EVO 4G+: May-June
HTC EVO Design 4G: June-July
HTC Incredible S: June-July
HTC Sensation: March-June
HTC Sensation 4G: March-June
HTC Sensation XE: March-June
HTC Sensation XL: April-Jun
HTC Rezound: June-July
HTC Rhyme: June-July
HTC Thunderbolt: July-August
HTC Velocity 4G: March-June
HTC Vivid: March-June
More here.