Seriously? I like almost any Legends wave over DC W3. 
Seriously. The Hasbro Legends stuff has been lackluster and there hasn't been one wave where I liked every figure. Other than the Galactus wave and maybe the Sentinal wave, the same is true for Toybiz's stuff. Plus you're a Marvel fan, so you would naturally like the Marvel stuff better. I'm a fan of both universes, so I have no set allegience.
Are you channeling Jeff and his Lantern fetish?
Not really, but I'm in the process of reading the current GL book in TPB form so Hal is fresh on my mind.
I love the Grundy and the Sinestro/Lantern are very well done but there have been decent figures of both before. The Nightwing is meh and the Robin is, well, Robin. Deathstroke is a nice figure and I don't recall a good version of that previously.
That's the thing, though. I don't have any of these figures in my collection, so they're new to me. I think the character selection is excellent. Batman and his family are probably my favorite characters in the DC universe, so naturally I'd like Nightwing and Robin. Like I said previously, GL is fresh on my mind, so that explains that. Add in two cool villians and one badass zombie-like BAF and it's the best wave ever.
Chemical testing in the greater Boston area today? 
Not unless I missed a memo...