Disclaimers: must be somewhat realistic and I'm not posting this implicitly because I think Lopez is soft or overrated as many comments have stated. I do think that with the current roster, an offensive oriented center with serious rebounding and defensive deficiencies outside of the restricted area, such as Lopez, is not what the nets need. I do think nets are much better with him obviously, but there are trades that would be even better.
Here are a few off the top of my head and if anyone wants to crunch the salary cap numbers which I've only considered slightly all the better:
noah + snell
pekovic + budinger
asik + parsons (most unrealistic since Dwight would have to move to 4 and parsons having great year)
vucecic (prob spelling it wrong but dude from magic) + Tobias Harris
Most of these are in nets favor, but I don't think out of the realm of possibility. What's everyone think?