He's 2nd among centers with 35 mpg and the median for the top 30 Cs based on mpg is 28 mpg. OTOH, he's averaged 33 mpg per year. I think if he's hurt or becomes hurt with a minor injury, they'd be careful, The Nets way out of the hole they've dug for themselves is through free agency, not the draft.
In any case, they're going to be really bad with him now that Joe Johnson seems to be sliding fast. Without Lopez they'd still have trouble edging out the Sixers with teams being desperate not to lose to the Sixers as a matter of pride.