If I were in your shoes, I would "decide" to return to Israel, with a return date at least a day or two after the visa interview. I take it that it's decision, not the actual return that must be made in the next few days. You are not marginal as to your assets, but unless they are already stated and documented on your existing I-864, you would need a new one to have them considered.
You don't say how long you must stay in Israel to keep your job before you leave to be with your wife in the USA, so that may be a consideration too. If she can state the present employment as of today is truthfully still ongoing on interview day, that simplifies things a lot. What you do the next day or after, has no bearing on her visa.