What size are they?
I assume they are in no-way similar to Kroxigor, rather than nothing like Saurus? 
(that gets confusing using negatives, but oh well)
Assuming they're Kroxigor size they look appropriate to me.
I like the club better than the spear, it just looks meaner. I have the same question as Geep, how tall are they?
I have three Infantry type Lizards being sculpted, lets call them small, medium and large Lizards for now. I don't know the actual height of the large Lizard, but I'm guessing around 20mm give or take, evidenced from the below pic.
That's much better 
.
Presumably there might be some sort of Velociraptor-based cavalry, some Dimetrodon-esque artillery type critters and a few Pterosaurs coming along at some point?
One would assume using those specific public domain names would get around any IP issues a certain other party might be tempted to raise?
The only slight downside is Eureka's prices, cheap they ain't! 
Yes, absolutely. There will be a full and very usable generic Lizard army for use in any 10mm gaming system you wish. It will certainly include Raptor type cavalry, very large creatures that can carry crew and fire giant arrows and also flying creatures and a number of heroes/characters as well...plus some other stuff.
A size comparison pic I received today between a yet to be named medium sized Lizard and a large Lizard;
