If you are the Hawks and you want Dwight, wouldn't it make sense to try and trade for him right now. Something like Dwight and Metta for Horford, Korver, and Petro (for money). Gives Atlanta a real shot at challenging the Heat this year and gives them control of Dwight (should he elect to leave). It also means they still have the rights to Smith (and Teague) who is Dwight's friend and thus makes it more likely that both return. LA gets probably as a good a return as they are going to get by getting Horford and Korver's shooting would be a great fit on that team (it also gets them out of one year of Metta saving them a **** ton of money).
I really think a team of Teague, Stevenson, Metta, Smith, Howard, Pachulia, Harris, and Morrow could challenge the Heat this year, add back in Louis Williams and re-sign Teague, Smith, and Howard next summer and you have a team that will challenge for a title for years if Howard can stay healthy.