Manish,
There should not be any problem in getting H1 stamping in India if you have all the docs, your wife can stay back in india on latest H4 and come back to US. Normally at the port of entry INS dont ask any thing if you have vaild H4 with necessary docs. And unless and until you do your PP stamping after 485 gets approve, your H1 is vaild and hence her H4.
Vaild H4 means she can enter on H4 without any problems, but now a days INS changing its rule on per day bases. so I would say avoid any trip if your approval is near but if you think that approval is not going to come in near future then enjoy your trip.
good luck